Swami Vivekananda was born on 12th January 1863 and died on 4th July 1902. He was also known as Narendra Nath Datta. He was a firm advocate of Vendatta Philosophies and Yoga. He was a disciple of Guru Ramakrishna and founded Ramakrishna Math and the Ramakrishna Mission. Bhakti-YogaDefinition of BhaktiThe Philosophy of IshvaraSpiritual Realisation, the aim of Bhakti-YogaThe Need of GuruQualifications of the Aspirant and the TeacherIncarnate Teachers and IncarnationThe Mantra: Om: Word and WisdomWorship of Substitutes and ImagesThe Chosen IdealThe Method and the Means